package string;

public class StringBuilderDemo {
    public static void main(String[] args) {


        String str="好好学习java";
        StringBuilder builder=new StringBuilder(str);

        builder.append(",为了找个好工作");
        System.out.println(builder);

        builder.replace(9,16,"就是为了挣钱潇洒");
        System.out.println(builder);

        builder.delete(0,8);
        System.out.println(builder);

        builder.insert(0,"上班");
        System.out.println(builder);
         /*StringBuilder builder1=new StringBuilder();
         StringBuilder builder2=new StringBuilder("abc");


         String str="abc";
         StringBuilder builder3=new StringBuilder(str);
         String str2=builder3.toString();

          */

    }
}
